Question About Remington 6 1/2 Primers

[walker2713]

Over the years I"ve used a ton of Rem 7 1/2 BR primers in almost any cartridge that requires a small rifle primer.

Please educate me on the proper use and role of their 6 1/2 primer....

Many thanks

George

 

[Ggmac]

61/2 =30 carbine , 25-20 , generally loads less than 40,000

 

[watercam]

Works great in the 22 Hornet. I have been wanting to test them against the Tula primers to see if they give better SD numbers in .223. Heck maybe even .308 if it will ignite it. The primer tests I have seen (photos of flash from various primers as well as shooting and chrono results) showed the 71/2 primers to be on the hot side. Seems the 61/2s might be just the ticket if they are available.

 

[walker2713]

I had two thousand sitting around, and hadn't used them since I stopped loading Hornets....

Planning to fire form 150 cases from 6BR to 6 Dasher, and not wanting "hot" or hard primers, a friend suggested either Feds or the Rem 6 1/2. I used them for the fire forming this morning, and all went very well. Decent velocity and excellent accuracy especially with the RL15 rounds I'd loaded.

 

[mac86951]

I had two thousand sitting around, and hadn't used them since I stopped loading Hornets....

Planning to fire form 150 cases from 6BR to 6 Dasher, and not wanting "hot" or hard primers, a friend suggested either Feds or the Rem 6 1/2. I used them for the fire forming this morning, and all went very well. Decent velocity and excellent accuracy especially with the RL15 rounds I'd loaded.

In my understanding, around time of 223 development slam fires from floating firing pins, and pierced cups were a problem. The 7-1/2 was to correct it. I have some old 222 pet loads that used the 6-1/2, as well as some 223, but even from then the message was beware a softer cup.

-Mac

 

[L.Sherm]

Tried to use them in a 222 rem. Mag. Pierced primers so I stayed with the 7.5s

 

[acloco]

Read the label on the 1000 count box - LOW PRESSURE only.

 

[BoydAllen]

I think that the problem that led to 7 1/2s came up when the .222 was developed. Something that has come along since then is the smaller diameter firing pin tip. I think that with one of those, the 6 1/2 might be able to handle higher pressures, but then with other options, why would you?

 

[Eraser]

I tried to use the 6 1/2 in my .222 reloads. Pierced primers and nasty hot gas cut on the bolt face next to the firing pin is what I got.

 

[ireload2]

They mash flat really easy in 25-20s and .22 Hornets
I think the cup is really thin like a small pistol primer

 

[yotehater]

I had several 1000 on the shelf and have been using them successfully in the 300blk. While the loads are not maximum there has not been a single failure of a 6 1/2 primer.

 

[mac86951]

I had several 1000 on the shelf and have been using them successfully in the 300blk. While the loads are not maximum there has not been a single failure of a 6 1/2 primer.

Good point. Might be a great primer for sub sonics too

 

[Ggmac]

DO NOT USE 61/2 in HIGH PRESSURE ,you will regret it . Burnt bolt face , firing pin etc . They were made for Low Pressure . 40,000 is just a guess from memory ( which sucks ) , 223 , 6 br , 6 TCU , 6 anything ( almost ) is high press

Even with bushed bolts !

 

[Shaggy357]

6 1/2 is standard primer. 7 1/2 is BR primer (although I would call it close to a "magnum" primer). I have never had a problem with either, tho I use 3-4 times as many 7 1/2s as I do 6 1/2s. I will have to go check my data to see specifics on where I use the 6 1/2s. It may be on the lower pressure cartridges.